Bormethyl
三甲硼
🗣️ 情景例句
They don't have a coffee shop.
他们也没有咖啡厅。
To live in the library
过着研究的生活
One day, the man downstairs went to talk to the man. He went upstairs and knocked the door.
一天，楼下人去找楼上人谈谈。 他上楼敲门。